Therefore, if the Earth moved, it would necessarily move with a triple motion: one, the diurnal rotation on its own axis; another, the annual revolution around the Sun; and a third, the motion of its axis.
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"For I am not so enamored of my own opinions that I would disregard what others may think of them."
"There are three kinds of motion of the earth, as I shall demonstrate below."
"At rest, however, in the middle of everything is the sun."
"Therefore, when I perceived that these and similar doubts arose concerning the order of the parts of the universe and the symmetry of its structure, I began to be vexed that no more definite explanati…"
"And so, in the first book, I describe the earth's general position and its various motions, and then I pass to the other planets, showing how their motions are related to the earth's."
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